Surfactant-stabilized organoalkoxysilane composition

a technology of organoalkoxysilane and stabilized organic acid, which is applied in the field of organic alkoxysilane, can solve the problems of precipitation or hazing, difficulty in practice, etc., and achieve the effects of less sensitive to effect, massive cost advantage, and increased storage stability of organoalkoxysilane compositions

US20090053411A1Inactive Publication Date: 2009-02-26SIKA TECH AG
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
Publication Date
2009-02-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention relates to organoalkoxysilane compositions which comprise at least one organoalkoxysilane S, and at least one anhydrous surfactant T, where the weight fraction of all of the organoalkoxysilanes S is 33% by weight, based on the weight of the organoalkoxysilane composition, and where the ratio of the weight sum of all of the organoalkoxysilanes S to the weight sum of all of the anhydrous surfactants T (S:T) has a value of from 5:1 to 1:2.
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Description

FIELD OF THE INVENTION

[0001] The invention relates to the field of organoalkoxysilanes.BACKGROUND ART

[0002] Organoalkoxysilanes are known substances and have long been used as—for example—adhesion promoters. They are frequently also referred to by the skilled worker as silanes. They have alkoxysilane groups, which in contact with water—in liquid form or as atmospheric moisture—are able to hydrolyze to form a silanol group (Si—OH) and then crosslink to siloxane compounds. This can lead to instances of precipitation or hazing even after a very short time. This sensitivity is very pronounced in particular in polar organoalkoxysilanes, and also at basic pH, and therefore in particular in aminosilanes.

[0003] When dealing with organoalkoxysilanes, therefore, it must be ensured that they are stored and processed to the exclusion of moisture. In many cases this leads in practice to difficulties, therefore, as for example if a pack is not impervious or if it has been opened and poorly closed.DI...

Examples

Embodiment Construction

[0061]

TABLE 1Organoalkoxysilanes used.AbbreviationOrganoalkoxysilaneA11103-AminopropyltrimethoxysilaneA1120N-(2-Aminoethyl)-3-aminopropyltrimethoxy-silaneA11303-[2-(2-Aminoethylamino)ethylamino]propyltri-methoxysilaneA1170Bis(trimethoxysilylpropyl)amineA1873-GlycidyloxypropyltrimethoxysilaneMTMSMethyltrimethoxysilane

[0062]Furthermore, the reaction product RP1 was prepared from 3-glycidyloxypropyltrimethoxysilane and N-(2-aminoethyl)-3-aminopropyltrimethoxysilane, by mixing 1 mol of A1120 with 3 mol of A187. Immediately after mixing, it was possible to check the conversion by IR. Although the band characteristic of the epoxy group, at about 910 cm−1, is still detectable immediately after mixing, it quickly disappears.

TABLE 2Surfactants used.AbbreviationSurfactantSupplier“Surfynol”Surfynol ® 61Air Products“Soprophor”Soprophor BSURhodia, Germany“FM33”Antarox FM33Rhodia, Germany“AE 01”EnviroGem ® AE 01Air Products“AE 02”EnviroGem ® AE 02Air Products“Hydropalat 120”Hydropalat ® 120Cognis...